gollings



(No Model.) 2 Sheets-Sheet 1. E. H. GOLLINGS.

ROTARY PUMP.

No. 448,836. Patented Mar. 17,1891.

(No Model.) I 2 Sheets-Sheet 2 E. H. .GOLLINGS.

ROTARY PUMP. No. 448,336. Patented Mar. 1'7, 1891.

. I I {I h I. h.

.f. I I v I v I k UNITED STATES ATENT FFICE.

ELLIOK II. GOLLINGS, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE GOLLlNGS BI-CENTRIO PUMP COMPANY, OF SAME PLACE.

ROTARY PUM P.

SPECIFICATION forming part of Letters Patent No. 448.336, dated March 17, 1891. Application filed May 31, 1890. Renewed January 8, 1891. Serial No. 377,174. (No model.)

T0 at whom it may concern.-

Be it known that I, ELLICK H. GOLLINGS, of Chicago, in the county of (look and State of Illinois, have invented certain new and useful Improvements in Rotary Pumps; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention is for certain features of construction in rotary pumps of the class comprising an outer shell, a shaft in the axis of said shell provided with an eccentric por tion having loosely mounted thereon a winged or chambered wheel, which engages the shell and either rotates therewith if the shell be rotative and the shaft stationary or gyrates in the shell if the latter be stationary and the shaft rotative.

The invention is illustrated in connection with a construction in which the shaft rotates and the shell is stationary or non-rota tive, the general construction in the machine, outside of those features hereinafter specially described and claimed, being the same as shown, described, and claimed in another application for patent filed by me simultaneously herewith and bearing the Serial No. 353,689.

In the accompanying drawings, which illustrate my invention, Figure 1 is a longitudinal vertical section of a pump having its shaft rotative and horizontal, said section being taken in the indirect line 1 1 of Fig. 2 and the shaft being shown in side elevation with its eccentric portion toward the eye. Fig. 2 is a transverse vertical section in the line 2 2 of Fig. 1. Fig. 3 is a transverse vertical section of the upper half of the pump in the line 3 3 of Fig. 1. Fig. 4. is a plan view of one of the sliding gates with a wing of the rating wheel which slides through the gate shown in transverse section.

A represents a frame having the uprights A and A at its opposite ends.

B is a shell which is bolted to these uprights and contains at one end apump-chamber 11, at the opposite end an induction-chamber b, and intermediate to said chambers a series of passages b separated by radial webs O is a rotating shaft having an eccentric portion 0, shown separated by collars cfrom the concentric portions of the shaft, and D is a winged wheel mounted loosely on the eccentric O and occupying and gyrating within the chamber b. The shaft 0 rests in bearings b 1), formed in the shell, and, as here illustrated, anti-friction rollers c surround the shaft in said bearings. Between the hub of the wheel D and the eccentric O are also shown anti-friction rollers 0 B is a rotating hollow casting of conical external form having its larger end toward the wheel D and affording revolving inlet and outlet ports for the pump. It is rotated by the shaft 0 through the medium of any suitable connection therewith. Such a connection is illustrated in Fig, 1, wherein the portcasting B is provided with a central socket b into which the end of the shaft G protrudes, and a pin 12" passes through the walls of the socket b and through a slot 0 in the end of said shaft. The inner end of said rotating port casting B desirably abuts against an annular shoulder b and its outer end against the inner surface of the frameupright A around the circular opening a in the latter. Said casting has its outside bearings in adjustable rings F F, fitted to the conical surfaces thereof and engaged by screw-threads, respectively, with the shell B and the uprightJ-X as clearly indicated in said Fig. 1.

p The port-casting B has a wall Zr, which divides its mouth or larger and inner end diametrically, the width of the free edge of said wall being greater than the width of a space 0 11 between the webs b where it runs in contact with the latter, so that it is always in bearing against the end of one of said webs on each side of the axis of the shaft. On one side of the Wall 12 a passage is afforded from 5 the spaces 12 to the opening a in the upright A and thence to the discharge-pipe A which is bolted to said upright around said opening a to form the discharge of the pump. On the other side of said wall I) the space is open to 10 the interior of the chamber 19', which is supplied by the suction-pipe B and also open to the space U between the webs b on that side of said division-wall The wheel I) is provided with a series of wings d, as shown most plainly in Figs. 2 and 3, said wings corresponding in numberto the number of the webs straight and radial, and they project into recesses Z2 in the inner polygonal periphery of the chamber Z), said recesses being of such depth that the ends of the wings d will bear against their bottom surfaces when thrown outward to their extreme of movement by the eccentric O, on which the wheel D is mounted. Said recesses h are'also of such width in the direction of the circumference that they severally accommodate the relative lateral movement of the wings therein in the gyrating motion of the wheel D produced by the rotation of the shaft 0, and they are desirably of such width that opposite wings of the wheel in a plane at right angles to the plane of the eccentric will both bear against the sides of the recesses into which they project. By such bearing of one of the wings the wheel is held from rotation with the shaft, and by that of the other wing the wheel is held more steadily in its place.

E E are gates, each fitted to slide at its ends in grooves e in the opposite parallel walls of the chamber B in close proximity to one of the fiat surfaces of the polygonal periphery of said chamber b, and each provided with an opening 6 through which passes one of the wings d of the wheel D. Said wings (l of the wheel D coincide with the webs b in the plane which passes through the axes of the shaft 0 and its eccentric portion C, and the gate E, applied to the most retracted wing 61, (which is the one opposite that which bears at its ends against the recess and is in the line of the throw of the eccentric,) closes the mouth of the recess b over which it is placed, so that by means of said gate and the adjacent wing d, acting in conjunction with the opposite wing (Z, bearing against the bottom of this recess 1) the space between the shell and the wheel is divided into two compartments, one of which isthe pressure or expulsion side of the pump and the other the suction side. By reason of the coincidence of these two divisional wings d with diametrically-opposite webs b the spaces 1) on one side of the axis of the shaft 0 are cut off from communication with the spaces on the opposite side of said axis. The casting B is arranged with the free edge of its wall 19 in the plane of the eccentric C and with its through or outlet passage in communication with the expulsion-compartment of the pump-chamber. The induction-chamber b is therefore in communication with the suction-compartment of the pump. Upon the rotation of the shaft 0 this relation continues, the divisional plane sweeping around with the shaft and being always substantially in the plane of the axes of the shaft and its eccentric portion.

These wings d are \Vhen the apparatus is arranged with the shaft C horizontal, as shown in the drawings, it is desirable to provide for the escape of air from the pump-chamber Z), and to this end several of the uppermost recesses 11 comm unicate with each other, and from the uppermost of these recesses leads an escape-passage for air, which is provided with a valve. This construction is shown in full lines in Fig. 3 and in dotted lines in Fig. 2, wherein the recesses which are in position to form pockets calculated to retain air therein are provided with circumferentially-directed slots 1, 2, 3, and 4. These slots are shown as being located midway of the length of the recesses, which is desirable, though not a necessary construction. The slot 1 has its bottom inclined upwardly from the recess 19 from which it leads in such manner as to allow the air to escape into the general interior of the pump-chamber. The slots 2, 3, and 4, respectively, connect the adjacent recesses. This formation of the extreme slots is with a view to the rotation of the shaft C in the,direction indicated by the arrow in Fig. 3. If the rotation were in the opposite direction, then the slot 1 should connect with the recess next above it, and the slot t might have the form of the slot 1. The construction shown gives full communication between the upper recess Z2 and both of the recesses on that side of it in the direction in which the shaft rotates, and in order to close these recesses on the pressure or expulsion side of the pump when the division takes place through either one of them the gate E is applied to each of said three recesses and has a wing e to close the slot.

The gates E may be of the rectangular form shown in full lines in Fig. 4, in which case they will severally embrace the wings d all around, or they may be cut away on one side, as indicated by dotted lines in Fig. l, and merely hooked back of the wings d. It will be understood that in the rotation of the shaft 0 in the direction indicated by the arrow in Fig. 2 the divisional plane of the pump-chamber happens for the moment to be horizontal, the expulsion-compartment being the compartment or space above this horizontal plane and the suction-compartment below it.

The air-valve G (illustrated in the drawings) is of familiar construction, and is fully described in said other application for patent filed by me simultaneously herewith and bearing the Serial No. 353,689.

I here claim as my invention- 1. In a pump of the general character described, the combination of a shell having recesses in its inner periphery, a shaft having an eccentric portion, a winged wheel mounted on said eccentric portion of the shaft, the wings of which wheel project into the recesses of the shell, and gates applied to the wings and recesses, substantially as described.

2. In a pump of the general character described, a shell having a polygonal pumpchainber, grooves c in the side walls of said chamber adjacent to its peripheral faces, and recesses in the peripheral faces, in combination with a gyrating winged wheel, the wings of which enter the recesses, and sliding gates fitted to the wings and to the grooves 3. In a pump of the general character de In a pump of the general character described, the combination, with the shell provided with interior recesses, the upper ones of which are in communication with each other by lateral air-passages, of a gyrating winged wheel, the wings of which enter the recesses of the shell, gates applied to said wings and recesses, and projections upon the gates extending into the recesses and adapted to close the lateral air-passages leading therefrom, substantially as described.

In testimony that I claim the foregoing as my invention I aflix my signature in presence of two witnesses.

- ELLICK H. GOLLINGS. lVitnesses:

M. E. DAYTON, O. Cnnnnucn P-ooLn. 

